Using the inquireInvoice command, you can fetch a link to an invoice that has been generated previously.
This can be useful if:
You prefer to invoke invoice generation asynchronously by setting invoiceCreationMethod to post, and make another API call later to retrieve the result.
You need to retrieve a copy of an invoice for reporting purposes or based on a customer request.
The inquireInvoice command doesn't regenerate the invoice; it only returns a link to the invoice — the exact same link that the addCgInvoice command returns when you generate an invoice with the invoiceCreationMethod parameter set to wait.
To perform an invoice inquiry, send a standard Hyp API request. In the int_in parameter, include an XML payload for the inquireInvoice command. The XML payload should look like this: